[evlatests] Some low-band issues

[Deb Shepherd]

I think this should be decided by Frazer and Paul.   It is very good to
know what the issues are but we have to be careful that we don't pull Paul
in too many directions at once.

On Thu, Mar 7, 2013 at 4:56 PM, Rick Perley <rperley at aoc.nrao.edu> wrote:

>    Fine with me.  But I do hope that, if something is found, which can be
> trivially repaired (such as, reversing a pair of cables), it can be
> repaired by somebody in the field?  This simple action wouldn't seem to be
> wasteful to me ...
>
>    Rick
>
> Deb Shepherd wrote:
>
>> Hi All,
>> A note of caution here:
>>
>> We have agreed in the low-band telecons that Frazer runs that the current
>> low-band priority to focus on receiver build and installation is
>> reasonable.    This means that we should not put effort into fixing
>> anything wrong with P-band receivers right now.   Just collect the problems
>> and deal with them after we have finished the installation.
>> So right now, although it is useful to know what receivers have problems
>> and what those problems may be, we are not going to spend effort fixing
>> those problems right now because it takes away too much effort from
>> actually building receivers.
>> The only scenario in which this would change is if Frazer decided that it
>> is best to change those priorities.    That said, what Rick is doing is
>> valuable and will be needed in the near future.
>> Cheers,
>> Deb
>>
>>
>> On Thu, Mar 7, 2013 at 3:51 PM, Ken Sowinski <ksowinsk at nrao.edu <mailto:
>> ksowinsk at nrao.edu>> wrote:
>>
>>     On Thu, 7 Mar 2013, Rick Perley wrote:
>>
>>     >    Paul:
>>     >
>>     >    Thanks for the reply.
>>     >
>>     >    So, it seems that  ea01 and ea03 should show fringes, but don't.
>>     > (In fact, ea01 was fringing, but the SNR was so low I had to
>>     leave it
>>     > out when making a bandpass calibration).
>>
>>     These two have their ploarizations swapped.  Is it feasible for
>>     Paul to consult with Jerry L about how to remedy this?
>>
>>     >    Perhaps Ken or Barry can update the parameters database with
>>     the Cal
>>     > values.
>>
>>     >    As for the F14s -- we'll try find out how to make sure these
>>     are on,
>>     > when needed.
>>
>>     I claim that these are turned on by the executor at every scan unless
>>     the script explcitly requires them to be off.  model2script does not
>>     generate scripts which does that, so they should all be on.  If not,
>>     it must be an F320 or F14 problem.  There is more than one way to
>>     command the F320 to turn on the cals; perhaps one is more equal than
>>     the others.
>>
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>>
>>
>>
>>
>> --
>> Debra Shepherd <dshepher at nrao.edu <mailto:dshepher at nrao.edu>>
>>
>> National Radio Astronomy Observatory   1003 Lopezville Rd
>> Socorro, New Mexico 87801
>> http://www.aoc.nrao.edu/~**dshepher <http://www.aoc.nrao.edu/~dshepher> <
>> http://www.aoc.nrao.edu/%**7Edshepher<http://www.aoc.nrao.edu/%7Edshepher>
>> >
>>
>>
>
>


-- 
Debra Shepherd <dshepher at nrao.edu>
National Radio Astronomy Observatory
1003 Lopezville Rd
Socorro, New Mexico 87801
http://www.aoc.nrao.edu/~dshepher
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